xkcd laser pointer moon

145k members in the xkcd community. Answer (1 of 15): For a number of reasons, the most important of which is that it’s not putting out enough photons to have any reasonable expectation that any of them will make it through the atmosphere. What if all the lightning in the world struck the same place? It was an infrared laser, so it wasn’t directly visible, but we can imagine building a visible-light laser with similar power. This could be a reference to the real FAA concern of the many incidents of people using laser pointers against aircraft. Speaker: gannimo Programs are full of bugs, leading to vulnerabilities. It … The moon is not very reflective (with an albedo it only reflects 1/8th of the light falling on it). 2: Additional Serious Scientific Answers to Absurd Hypothetical Questions comes out 9/13. No need to imagine. But at the Moon distance it would be spread to large spotsize. This means you're free to copy and share these comics (but not to sell them). — Peter Lipowicz ... a friend who is doing his dissertation as computer engineer and he showed me xkcd.com site, especially this sheet: xkcd.com 627.png...my solution was: ask Paolo! Well, now there'll be a relevant xkcd game based on a relevant xkcd comic for any given situation! What If? The title text makes a pun on the chamber in which lasers are formed, known as a laser cavity. article! In fact, it gives much more light to the moon than the laser pointers and this is why there is no noticeable change. There was an xkcd feature a while back which asked the question "If everyone in the world shined a laser pointer at the moon at the same time, would we be able to see it?". The photons will be spread out, if you hold the laser pointer steady, to about 500 to 1000km diameter, or about 1 photon per sq meter per second at the moon’s surface. The Laser Elevator. What if you could drain all the water from the oceans? An Amazon Best Book of the Month, September 2014: What if everyone on earth aimed a laser pointer at the moon at the same time? I recently finished reading the Kim Stanley Robinson novel 2312 - set, of course, in the year 2312. The answer was no. This work is licensed under a Creative Commons Attribution-NonCommercial 2.5 License. 358 votes, 37 comments. Nov. 3, 2014. If every person on Earth aimed a laser pointer at the Moon at the same time, would it change color? Not if we use regular laser pointers. The first thing to consider is that not everyone can see the Moon at once. We could gather everyone in one spot, but we learned our lesson about that a few weeks ago. Are Laser Pointers Dangerous to Pilots? Here for example they measured the spot size and light intensity up to about 100m distance. What If? Preorder here! Preorder here! The whole moon - 2*10^6m, 4*10^12m^2. If the experiment was repeated with more power (1 watt instead of 5 milliwatts), the disappointing results would be relatively the same. If you're an artist, you're paying for your materials … Unsurprisingly, there is a relevant XKCD for this! We'll discuss power and limitations of code-pointer integrity (CPI), a strong but practical security policy that enforces memory safety for all code pointers, protecting against any form of … Feb 28, 2012 - Small vignette I made based off the xkcd comic Laser Pointer. Archive; What If? The massively powerful laser they use to hit the reflectors left on the moon still only return enough photons to be barely detectable by sensitive instruments. Proof we made it to the moon: You can still bounce a laser off it today. Laser beams aren’t perfectly parallel so there’s still some spread over long distances. This lights up the surface of the Moon with about half a lux of illumination—compared to about 130,000 lux from the sun. They say there's always a relevant xkcd comic for any given situation. The analysis starts out with 5mW laser pointers, and bumps up the power level over and over, until it reaches ludicrous levels! The typical red laser pointer is about 5 milliwatts, and a good one has a tight enough beam to actually hit the Moon—though it’d be spread out over a large fraction of the surface when it got there. In a 2002 paper, Laser Elevator: Momentum Transfer Using an Optical Resonator (available at your local school/library, possibly electronically — J. of Spacecraft and Rockets 2002), Thomas R. Meyer et. This work is licensed under a Creative Commons Attribution-NonCommercial 2.5 License. We Need More Power. Mille grazie Paolo If I shot an infinitely strong laser beam into the sky at a random point, how much damage would it do? Into the Blue. What If? I found it, and it is that all humans ar-- SEGMENTATION FAULT. For the Apollo Lunar Ranging Experiment, the … At closest, the moon is 225,000 miles away, at furthest about 252,000 miles. Warning: this comic occasionally contains strong language (which may be unsuitable for children), unusual humor (which may be unsuitable for adults), and advanced mathematics (which may be unsuitable for liberal-arts majors). the folks at XKCD took a shot at answering the question "If every person on Earth aimed a laser pointer at the Moon at the same time, would it change color?". If you're in a band, you're paying for gas to get to and from practice and gigs, studio time, and all the bits and pieces of tech you need to sound good. I worked out that a 100 mA green LED with a 10° half-angle 18 kilometers away … Relevant XKCD … 2: Additional Serious Scientific Answers to Absurd Hypothetical Questions comes out 9/13. In the question How to make a green LED as visually bright as a 0 magnitude star? More details.. Come to … Laser jet removal appears to be the destruction of jets with lasers, which apparently works, but angered the Federal Aviation Administration, and probably resulted in legal consequences for the reviewer. Laser Pointer. XKCD’s hilarious ‘What if?’ series answers another farfetched question as only they can. Pointers (alt-text) Every computer, at the unreachable memory address 0x-1, stores a secret. Earthlight, on the moon is around 10 lux, so this is the best case. Illuminated by around 0.1W/m^2, or 5*10^11W. We made a clicker game out of it! Behind "a", there is a pointer like 0x3A28213A, which would mean the value is … A black cat crouches, staring at the red dot.] This means you're free to copy and share these comics (but not to sell them). |< >| What If? What does xkcd mean? A Conversation With Randall Munroe, the Creator of XKCD. One of the experiments taken into space on Apollo 11 was called the Lunar Laser Retro-Reflector, and it … is one of my Internet must-reads, and I look forward to each new installment, and always read it with delight.-- "Cory Doctorow, New York Times bestselling author" Required reading across the world.-- "New York Times" Munroe applies reason and research to hypothetical conundrums ranging from the philosophical to the scientific (often absurd but never pseudo) that probably … September 26, 2012. More details.. A programming statement like int a = 5; will write the integer value "5" into the memory cell whose address is remembered with the letter "a". This is a very different case, shining LASERs back at the earth. If every person on Earth aimed a laser pointer at the Moon at the same time, would it change color? The Boeing YAL-1 was a megawatt-class chemical oxygen iodine laser mounted in a 747. al. Yes. Pointers is the 138th xkcd comic. Fans of xkcd ask Munroe a lot of strange questions. xkcd is a highly successful webcomic, created by Randall Monroe. About By Megan Garber. Our laser keeps pouring more and more energy into the plasma, and the plasma keeps getting hotter and hotter. The particles bounce off each other, slam into the surface of the Moon, and eventually blast away into space at a terrific speed. That's the question the classic What If from XKCD is trying to answer. [The cat pounces.] Solar sails suck. [The cat lands with its paw on the … Q: What would happen if a beloved web comic created a series of ... physics explainers? A game built for XKCD game jam. will be required reading for xkcd fans and anyone who loves to ponder the hypothetical. “Not if we used regular laser pointers.” The explanations are accompanied by the same stick-figure drawings and nerdy wit that made xkcd popular. 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